The Lord’s Supper unites past, present, and future.
1 Cor 11:23-26
23 For I received from the Lord that which I also delivered to you: that the Lord Jesus on the same night in which He was betrayed took bread; 24 and when He had given thanks, He broke it and said, “Take, eat; this is My body which is given for you; do this in remembrance of Me.” 25 In the same manner He also took the cup after supper, saying, “This cup is the new covenant in My blood. This do, as often as you drink it, in remembrance of Me.” 26 For as often as you eat this bread and drink this cup, you proclaim the Lord’s death till He comes.
The Holy Meal is simultaneously a remembrance of what Christ did in the past, a proclamation of that Gospel in the present, and an anticipation for the coming kingdom of God in the future.
Right now, in our eating and drinking of the bread and the fruit of the vine, past, present, and future are united in the event. We participate in the Eternal and with the Eternal One.